巻号一覧
13 巻, 5 号
選択された号の論文の10件中1～10を表示しています
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國枝 溥1948 年 13 巻 5 号 p. 177-187
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーObservation on the comparative anatomy of the myodomes of the Vertebrata led the author to find the following facts. the striking common feature of many fishes of Esospondyli except Elops and Chanos is the presence of an elastic string which extends just under the vertebra from the myodome to the caudal vertebra. “The string of the fish” is not observed in all other teleosts. It is possible to arrange many species in a group of the fishes in order by taking the structure and development of the my odomes into sufficient considerationn. Judging from the present investigation, it is mentioned that the affinities and classification of many kinds of the Vertebrata are founed upon the evolution of the myodomes. there is not the slightest doubt that reptires are not descended from Stegocephalous. Amphibia with which Branchiosarurs salamandroides has relationship. It is probable that the Reptiles are evolved from fish-like ancestors which seem to be allied with the Apodes. On observing the process of the evolution of the myodomes of the fishes, the author came to conceive that “Evlolution follows pre-determined courses” and “Evolution develops in blocks of successive stages”. In teleosts the character of the myodome, especially that of the parasphenoid, seems to be the diagnosis of a species.抄録全体を表示PDF形式でダウンロード (1112K) -
岩田 清二1948 年 13 巻 5 号 p. 188-192
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーIt is always able to induce Mactra veneriformis to discharge the reproductive substances by the injection of the isotonic aqueous solution of KC1 into ist visceral cavity. Mactra discharges the reproductive substances immediately or in a few minutes after the injection. It reaches the maximum discharge soon after the beginning of its reaction, and afterwards decreases gradually the quantity. In some cases the duration of discharge lasted more than 2 hours. Less than 1.5cc of the isotonic solution of KC1 is sufficient to induce the discharge. No distinct relation can be found between the size of bivalve and the least amount of KC1 solution necessary for the induction of the discharge. The female, however, has the tendency of the discharge by the injection of less amounf of KC1 solution than the male reacts.
The neutral K-salts such as KBr, KNO3, K2SO4 are all effective to induce the discharge, while CaCl2, MgSO4 and sea water are not so much effective as K-salts. The results of my experiment suggest that the K-contracture of gonad muscle fibres, caused by the injection of K-salt solutions, seems to induce in the main to discharge the reproductive substances of Mactra.抄録全体を表示PDF形式でダウンロード (382K) -
須藤 俊造1948 年 13 巻 5 号 p. 193-194
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリー1. The spores of Porphyra tenera were collected from the sea by sedimentation.
They occurred twice in autumn, i. e. in the beginning of Ocrober and in the middle of Nocember.
2. The October spores measured 9.4μ-12.5μ in diameter and were counted 50-70per L. There is much resemblance between the characters of them and those of the carpospores on the plants in the previous winter. They give rise to the “autumn buds”.
3. The November spores measured 12μ-17μ in diameter and were counted 100-300per L. They were identified as the monospores from the autumn plants. Ther give rise to the “December buds”.抄録全体を表示PDF形式でダウンロード (155K) -
天野 慶之1948 年 13 巻 5 号 p. 195-198
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーAn strict anaerobic organism, possibly related to Clostridium fissum (Debono) Bergey et a 1, was isolated from swelled cans of Oyster (Ostrea gigans Thunberg) in vegetable oil.
There samples swelled in 2 or 14days after processed at 110°C for 90minutes in author's laboratory. (about 70% of 225 cooked samples swelled.)
The heat tolerance tests indicate that spores of the organism survive 108°C for 30minutes.
It was also found another strain closely related to the swelled cans type in digestive tracts of fresh oysters.抄録全体を表示PDF形式でダウンロード (326K) -
第一報鹽類の影響について高橋 豊雄1948 年 13 巻 5 号 p. 199-202
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーThe descrepancy was observed in the reported optimum temperatures of the enzymes of the fishes and it was seen that the temperature of ambient medium was a factor. On the other hand, it was reported that the optimum temperature varies with the experimental conditions and the same phenomenon was observed on the heat-stabiltiy of enzyme which is closely related with the optimum temperature. I prepared the glycerine-extract of pylorica coeca of Seriola quinqueradiata and studied the effectes of NaCl and Na-phosphate on the heat-stability of the proteolytic enzyme.
From fig. (2-7), it is seen the heat-stability of enzyme is greatest at the certain concentration of salt.抄録全体を表示PDF形式でダウンロード (251K) -
岡正 雄1948 年 13 巻 5 号 p. 203-206
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーDxperiments have been worked about how fishes, Aplocheilus iatipes being used as materials, pass through the meshes of net in ordor to place a biological basis on the scientific researohes of fishing methods and implements. The results were obtained relating to the size of meshes and the thickness of netting cord, and the attraction of a head individual to the following in a shoal of the fish which passing through the meshes was mathematically expressed.抄録全体を表示PDF形式でダウンロード (243K) -
田内 森三郎1948 年 13 巻 5 号 p. 207-209
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーThe present study statistically shows that the variation on the yield of spring herring in Hokkaido is resulted mainly by the oceanographical conditions of fishing ground.抄録全体を表示PDF形式でダウンロード (136K) -
大島 泰雄1948 年 13 巻 5 号 p. 210-212
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーWe have only an incomplete knowledge on the process of the metamorphosis in the Spiny-lobster, while in past investigations the age has been investigated without any careful examination of the metamorphois-period. In this paper these points are examined by the materials obtained on the spawning season and the duration of the last larval stage, Puerulus.抄録全体を表示PDF形式でダウンロード (189K) -
畑中 正吉1948 年 13 巻 5 号 p. 213-215
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーA secular period of 10-11years has been found, during the last thirty-seven years, in the variations of temperature and salinity of sea-water at Enoshima Ireland, Miyagi Prefecture. This cyclic relation is closely related with the variation of the sun-spots area. Namely, reckoning from the time of the minimum value of the sun-spots area, the distinguished low temperature and low salinity occured within 1-4 months and the market high temperature and high salinity occured 2 years before.抄録全体を表示PDF形式でダウンロード (214K) -
森高 次郎, 松蒲 文雄, 田口 富美子1948 年 13 巻 5 号 p. 216-218
発行日: 1948/03/30
公開日: 2008/02/29
ジャーナル フリーDigestibility of proteins in edible algae, such as Porphyra tenera. Undaria pinnatifeda, Laminaria angstata, Laminaria ochotensis, Hjikiya fusiformis, Eisenia bicyclis, in unedible algae, such as Gelidium amansii, Gloiopeltis tenax, Ahnfeltia plicata, Fucus evanescens, Sargassum enerve, Ecklonia cava, Ulva pertusa, and in an article of food, “Kaihomen, ” prepared from Laminaria species was measured by Tomiyama's method.
The result obtained were as the following.
1) Digestibility of the protein in algae is generally low, i. e. -15.1%-71.5%, though there is a quite much difference by the species.
2) Digestibility of the protein in “Asakusanori” (Porphyra tenera) of superior quality is not better than that of the inferior.
3) Digestibility of the protein in “Kaihomen, ” a kind of food prepared from Laminaria is extremely lower than that of the eriginal algae.抄録全体を表示PDF形式でダウンロード (920K)
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